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A closed pipe and an open pipe sounding together produce 5 beats per second. If the length of the open pipe is 30 cm, find by how much the length of the closed pipe should be changed to bring the two pipes in unison. Take speed of sound in air is 330 m/s.

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The correct Answer is:
Changed by ` 10/11 % or 0.14` cm
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A closed pipe and an open pipe produce simultaneously a sound with 5 beats per second. If the length of the open pipe is 30 cm, then determint the required change in the length of the closed pipe if both the pipes are to produce the sound of same frequency. Speed of sound is 330 ms^(-1) .

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